The growth of the ledger is inevitable but if the block size becomes too large it will outpace hardware capacity and internet bandwidth increases. If outpaced, it would leave the average user behind, one who wishes to deploy a full node. As of right now, a single user can scale at a cost effective pace.

Globally there are an estimated 25,000 licensed banks (see link below). They are centralized and collude with one another, as evident by our failing banking systems.

Bitcoin and other blockchains are avoiding centralization in principle, so allowing the network to be supported by a similar number of business and/or companies would return to the problems that this innovation is attempting to correct.